LM2760 datasheet(4/10 Pages) NSC

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Electrical Characteristics

(Notes 2, 8)

(Continued)

Note 11: In determining quiescent supply current limits, the voltage on the VOUT pin is forced to 200mV above the typical VOUT to ensure that the charge pump is

inactive and all internal switches are off.

Note 12: The "normal operation" supply current specification is a measure of the time-averaged supply current when there is no current load connected to the output

of the LM2760. During this so-called normal operation, the charge pump occasionally is activated to provide charge to the output cap and keep the output voltage

from drooping. This is necessary because, when the pump is not active, the output capacitor supplies current to the internal feedback resistor divider. The occasional

pumping typically occurs every 2 seconds on average, contains a few short pump cycles, and results in a small increase in the average quiescent supply current.

Note 13: Turn-on time is measured from when the input voltage (VIN) is established until the output voltage crosses 90% of its final value.

Block Diagram

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